EP2346612B1 - Device for separating ferromagnetic particles from a suspension - Google Patents

Device for separating ferromagnetic particles from a suspension Download PDF

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Publication number
EP2346612B1
EP2346612B1 EP09783394.1A EP09783394A EP2346612B1 EP 2346612 B1 EP2346612 B1 EP 2346612B1 EP 09783394 A EP09783394 A EP 09783394A EP 2346612 B1 EP2346612 B1 EP 2346612B1
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EP
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Prior art keywords
ferromagnetic particles
suspension
flow
space
reactor
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German (de)
French (fr)
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EP2346612A1 (en
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Vladimir Danov
Bernd Gromoll
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Siemens AG
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Siemens AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/28—Magnetic plugs and dipsticks
    • B03C1/288—Magnetic plugs and dipsticks disposed at the outer circumference of a recipient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/18—Magnetic separation whereby the particles are suspended in a liquid

Definitions

  • the invention relates to a device for separating ferromagnetic particles from a suspension, with a reactor through which the suspension can flow, with at least one magnet arranged on the outside of the reactor for forming a magnetic field which deflects the ferromagnetic particles.
  • the ore is ground to powder and the resulting powder mixed with water.
  • This suspension is exposed to a magnetic field generated by one or more magnets, so that the ferromagnetic particles are attracted, whereby they can be separated from the suspension.
  • a generic device is from the EP 1 913 991 A1 known.
  • the device described therein is designed for cleaning an electrically conductive liquid.
  • a reactor is filled with the electrically conductive liquid, by a magnetic field, an axial, downward force is generated, so that the electrically conductive liquid circulates within the reactor.
  • a device for separating ferromagnetic particles from a suspension in which an iron rod drum is used.
  • the iron rods are alternately magnetized during rotation of the drum, so that ferromagnetic particles adhere to the iron rods, whereas other components of the suspension fall between the iron rods.
  • a magnetic separator is used in the US 4,921,597 B described.
  • the magnetic separator has a drum on which a plurality of magnets are arranged. The drum is rotated opposite to the flow direction of the suspension so that ferromagnetic particles adhere to the drum and are separated from the suspension.
  • a process for the continuous magnetic separation of suspensions is known from WO 02/07889 A2 known.
  • a rotatable drum is used in which a permanent magnet is mounted to deposit ferromagnetic particles from the suspension.
  • a tubular reactor is used to separate the ferromagnetic particles from the suspension, through which the suspension flows.
  • one or more magnets are arranged, which attract the contained ferromagnetic particles.
  • the ferromagnetic particles migrate to the reactor wall and are held by the magnet arranged on the outside of the reactor.
  • the invention has for its object to provide a device for separating ferromagnetic particles from a Specify suspension in which the deposition process can be carried out continuously and efficiently.
  • the at least one magnet forming a ferromagnetic particles radially deflecting magnetic field that the reactor has an interior and a surrounding outer space, said interior and exterior space by a tubular insert from each other are separated and the insert has at least one radial opening in the vicinity of the at least one magnet for receiving the radially deflected ferromagnetic particles.
  • the device according to the invention has the advantage that it can be operated continuously.
  • the suspension flows through the interior space, ferromagnetic particles contained in the suspension get into the influence of the magnetic field generated by the at least one magnet and are attracted by the latter.
  • the ferromagnetic particles pass through the at least one opening into the interior and accumulate in the outer space, preferably on the inner wall of the reactor. The ferromagnetic particles separated in this way from the suspension flowing through the interior can then be deposited comparatively easily.
  • the interior of the device according to the invention has a circular cross section and the outer space has an annular cross section. Accordingly, the insert can be tubular, the outer space is limited by a jacket tube.
  • the insert may have a plurality of apertures spaced from one another in the flow direction.
  • ferromagnetic particles are gradually separated from the suspension, so that the Concentration of the ferromagnetic particles in the outer space continuously increased.
  • the insert has a plurality of circumferentially spaced openings and a plurality of magnets. Each opening in the insert may be associated with a magnet, so that the ferromagnetic particles move radially from the interior to the outer space.
  • the at least one magnet is designed as an electromagnet, which is preferably switched on and off. If an electromagnet or a plurality of electromagnets is provided, these can be controlled on and off.
  • the electromagnet When the electromagnet is switched off, the magnetic field collapses, so that the ferromagnetic particles adhering to the inner wall of the outer space are entrained by the flow. In this state, the suspension, which is located in the outer space, are separated, whereby the desired separation of the ferromagnetic particles is achieved by the suspension. Subsequently, the electromagnets can be turned on again, so that the ferromagnetic particles flow again from the interior into the outer space and adhere there to the inner wall of the reactor.
  • a control of the movement of the ferromagnetic particles can also take place in the device according to the invention in that the strength of the magnetic field generated by the at least one electromagnet is controllable.
  • the diameters of the interior and exterior space and the flow velocity of the suspension are selected such that there is virtually no cross flow between the interior space and the exterior space.
  • a control for switching on or off the flow in the outer space and / or the interior is provided.
  • the flow in the outside space can be turned on while being turned off in the inside space.
  • only the flow in the interior can be switched on, so that ferromagnetic particles migrate under the influence of the magnetic field into the outer space, in which there is no flow.
  • the flow in the outer space is turned on intermittently or intermittently.
  • the figure is a schematic representation and shows a section through a device according to the invention for separating ferromagnetic particles from a suspension.
  • the device 1 comprises a reactor 2, on the outside of which magnets 3, 4 are arranged. These are electromagnets that can be switched on and off by means of a controller 5.
  • the reactor 2 comprises an insert 6, which is tubular in the illustrated embodiment.
  • the reactor 2 is also tubular or cylindrical.
  • the insert 6 in the reactor 2 separates an inner space 7 in the interior of the insert 6 from an outer space 8, which has an annular cross-section and is delimited by the outer wall of the reactor 2.
  • the insert 6 has a plurality of spaced-apart openings 9, 10, through which the inner space 7 is connected to the outer space 8.
  • the opening 9 is located in the vicinity of the magnet 3
  • the opening 10 is located in the vicinity of the magnet 4.
  • further openings may be present, which are distributed either over the circumference of the insert 6 and / or in the longitudinal direction of the insert. 6 , So arranged in the flow direction, distributed.
  • Each of these further openings may be associated with a magnet.
  • the device shown in the figure allows the separation of ferromagnetic particles from a suspension.
  • the interior 7 of the reactor 2 is filled via a line, not shown, with the suspension 11 and continuously flows through the suspension 11.
  • the magnets 3, 4 are switched on by the controller 5
  • ferromagnetic particles contained in the suspension 11 are deflected radially out of the flow under the influence of the magnetic field generated by the magnets 3, 4.
  • the ferromagnetic particles pass through the openings 9, 10 and enter the outer space 8 of the reactor 2, where they accumulate on the inner wall, as shown in the figure.
  • the outer space 8 can also be flowed through by the suspension 11, but it is also conceivable to allow the suspension 11 to flow only through the inner space 7, so that the ferromagnetic particles gradually accumulate in the outer space 8.
  • the flow velocity in the interior space 7 is adjusted to the geometrical parameters of the reactor and in particular to the size and number of the openings 9, 10 so that practically no pressure loss occurs between the interior space 7 and the exterior space 8, so that no cross flow through the openings 9 , 10 arises and only the ferromagnetic particles under the influence of the magnetic field from the interior 7 in the outer space 8 wander.
  • the controller 5 can also be used to control the strength of the magnetic field generated by the magnets 3, 4.
  • the magnetic field can be controlled to turn on and off intermittently or intermittently so that the ferromagnetic particles adhering to the inner wall of the reactor 2 are automatically deposited after a certain time.
  • the controller is also able to turn the flow through the interior 7 (primary flow) or the flow in the exterior space 8 (secondary flow) on or off, so that, for example, the exterior space 8 can be flushed in a targeted manner.

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  • Physical Or Chemical Processes And Apparatus (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Abscheiden ferromagnetischer Partikel aus einer Suspension, mit einem von der Suspension durchströmbaren Reaktor mit wenigstens einem an der Außenseite des Reaktors angeordneten Magneten zur Ausbildung eines die ferromagnetischen Partikel ablenkenden Magnetfelds.The invention relates to a device for separating ferromagnetic particles from a suspension, with a reactor through which the suspension can flow, with at least one magnet arranged on the outside of the reactor for forming a magnetic field which deflects the ferromagnetic particles.

Um ferromagnetische Bestandteile, die in Erzen erhalten sind, zu gewinnen, wird das Erz zu Pulver gemahlen und das erhaltene Pulver mit Wasser gemischt. Diese Suspension wird einem Magnetfeld ausgesetzt, das durch einen oder mehrere Magnete erzeugt wird, sodass die ferromagnetischen Partikel angezogen werden, wodurch diese aus der Suspension abgeschieden werden können.To recover ferromagnetic constituents obtained in ores, the ore is ground to powder and the resulting powder mixed with water. This suspension is exposed to a magnetic field generated by one or more magnets, so that the ferromagnetic particles are attracted, whereby they can be separated from the suspension.

Eine gattungsgemäße Vorrichtung ist aus der EP 1 913 991 A1 bekannt. Die dort beschriebene Vorrichtung ist zum Reinigen einer elektrisch leitenden Flüssigkeit ausgebildet. Dazu wird ein Reaktor mit der elektrisch leitenden Flüssigkeit gefüllt, durch ein Magnetfeld wird eine axiale, nach unten gerichtete Kraft erzeugt, so dass die elektrisch leitende Flüssigkeit innerhalb des Reaktors zirkuliert.A generic device is from the EP 1 913 991 A1 known. The device described therein is designed for cleaning an electrically conductive liquid. For this purpose, a reactor is filled with the electrically conductive liquid, by a magnetic field, an axial, downward force is generated, so that the electrically conductive liquid circulates within the reactor.

Aus der DE 27 11 16 A ist eine Vorrichtung zum Trennen ferromagnetischer Partikel aus einer Suspension bekannt, bei der eine aus Eisenstäben bestehende Trommel verwendet wird. Die Eisenstäbe werden während der Drehung der Trommel abwechselnd magnetisiert, sodass ferromagnetische Partikel an den Eisenstäben anhaften, wohingegen andere Bestandteile der Suspension zwischen den Eisenstäben herunterfallen.From the DE 27 11 16 A For example, a device for separating ferromagnetic particles from a suspension is known in which an iron rod drum is used. The iron rods are alternately magnetized during rotation of the drum, so that ferromagnetic particles adhere to the iron rods, whereas other components of the suspension fall between the iron rods.

In der DE 26 51 137 A1 wird eine Vorrichtung zur Trennung magnetischer Partikel von einem Erzmaterial beschrieben, bei der die Suspension durch ein Rohr geleitet wird, das von einer Magnetspule umgeben ist. Die ferromagnetischen Partikel sammeln sich am Rand des Rohrs an, andere Partikel werden durch ein mittleres Rohr, das sich im Inneren des Rohrs befindet, abgeschieden.In the DE 26 51 137 A1 An apparatus for separating magnetic particles from an ore material is described the suspension is passed through a tube surrounded by a magnetic coil. The ferromagnetic particles accumulate at the edge of the tube, other particles are separated by a central tube, which is located inside the tube.

Ein magnetischer Separator wird in der US 4,921,597 B beschrieben. Der magnetische Separator besitzt eine Trommel, auf der eine Mehrzahl von Magneten angeordnet ist. Die Trommel wird entgegengesetzt zur Fließrichtung der Suspension gedreht, sodass ferromagnetische Partikel an der Trommel anhaften und von der Suspension getrennt werden.A magnetic separator is used in the US 4,921,597 B described. The magnetic separator has a drum on which a plurality of magnets are arranged. The drum is rotated opposite to the flow direction of the suspension so that ferromagnetic particles adhere to the drum and are separated from the suspension.

Ein Verfahren zur kontinuierlichen magnetischen Separation von Suspensionen ist aus der WO 02/07889 A2 bekannt. Dort wird eine drehbare Trommel verwendet, in der ein Permanentmagnet befestigt ist, um ferromagnetische Partikel aus der Suspension abzuscheiden.A process for the continuous magnetic separation of suspensions is known from WO 02/07889 A2 known. There, a rotatable drum is used in which a permanent magnet is mounted to deposit ferromagnetic particles from the suspension.

Bei bekannten Vorrichtungen wird zur Trennung der ferromagnetischen Partikel von der Suspension ein rohrförmiger Reaktor verwendet, durch den die Suspension strömt. An der Außenwand des Reaktors sind ein oder mehrere Magnete angeordnet, die die enthaltenen ferromagnetischen Partikel anziehen. Unter dem Einfluss des durch die Magneten erzeugten Magnetfelds wandern die ferromagnetischen Partikel an die Reaktorwand und werden von dem an der Außenseite des Reaktors angeordneten Magneten gehalten. Dies ermöglicht zwar eine wirksame Separation, das Abscheideverfahren kann jedoch nur diskontinuierlich durchgeführt werden, da nach der Anlagerung einer bestimmten Menge der ferromagnetischen Partikel der Reaktor geöffnet und die ferromagnetischen Partikel entnommen werden müssen. Erst anschließend kann eine neue Suspension zugeführt oder die bereits einmal benutzte Suspension erneut dem Abscheideverfahren unterworfen werden.In known devices, a tubular reactor is used to separate the ferromagnetic particles from the suspension, through which the suspension flows. On the outer wall of the reactor, one or more magnets are arranged, which attract the contained ferromagnetic particles. Under the influence of the magnetic field generated by the magnets, the ferromagnetic particles migrate to the reactor wall and are held by the magnet arranged on the outside of the reactor. Although this allows an effective separation, but the deposition process can only be carried out batchwise, since after the addition of a certain amount of ferromagnetic particles, the reactor must be opened and the ferromagnetic particles must be removed. Only then can a new suspension be supplied or the suspension which has already been used once again be subjected to the separation process.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Abscheiden ferromagnetischer Partikel aus einer Suspension anzugeben, bei der das Abscheideverfahren kontinuierlich und effizient durchgeführt werden kann.The invention has for its object to provide a device for separating ferromagnetic particles from a Specify suspension in which the deposition process can be carried out continuously and efficiently.

Zur Lösung dieser Aufgabe ist bei einer Vorrichtung der eingangs genannten Art erfindungsgemäß vorgesehen, dass der wenigstens eine Magnet ein die ferromagnetischen Partikel radial ablenkendes Magnetfeld ausbildet, dass der Reaktor einen Innenraum und einen diesen umgebenden Außenraum aufweist, wobei Innenraum und Außenraum durch einen rohrförmigen Einsatz voneinander getrennt sind und der Einsatz wenigstens eine radiale Öffnung in der Nähe des wenigstens einen Magneten aufweist zur Aufnahme der radial abgelenkten ferromagnetischen Partikel.To solve this problem is inventively provided in a device of the type mentioned that the at least one magnet forming a ferromagnetic particles radially deflecting magnetic field that the reactor has an interior and a surrounding outer space, said interior and exterior space by a tubular insert from each other are separated and the insert has at least one radial opening in the vicinity of the at least one magnet for receiving the radially deflected ferromagnetic particles.

Die erfindungsgemäße Vorrichtung weist den Vorteil auf, dass sie kontinuierlich betrieben werden kann. Die Suspension strömt durch den Innenraum, in der Suspension enthaltene ferromagnetische Partikel geraten in den Einfluss des durch den wenigstens einen Magneten erzeugten Magnetfelds und werden von diesem angezogen. Die ferromagnetischen Partikel gelangen durch die wenigstens eine Öffnung in den Innenraum und lagern sich in dem Außenraum, vorzugsweise an der Innenwandung des Reaktors, an. Die auf diese Weise von der durch den Innenraum strömenden Suspension separierten ferromagnetischen Partikel können anschließend vergleichsweise einfach abgeschieden werden.The device according to the invention has the advantage that it can be operated continuously. The suspension flows through the interior space, ferromagnetic particles contained in the suspension get into the influence of the magnetic field generated by the at least one magnet and are attracted by the latter. The ferromagnetic particles pass through the at least one opening into the interior and accumulate in the outer space, preferably on the inner wall of the reactor. The ferromagnetic particles separated in this way from the suspension flowing through the interior can then be deposited comparatively easily.

Es wird besonders bevorzugt, dass der Innenraum der erfindungsgemäßen Vorrichtung einen kreisförmigen Querschnitt und der Außenraum einen ringförmigen Querschnitt aufweist. Dementsprechend kann der Einsatz rohrförmig ausgebildet sein, der Außenraum wird durch ein Mantelrohr begrenzt.It is particularly preferred that the interior of the device according to the invention has a circular cross section and the outer space has an annular cross section. Accordingly, the insert can be tubular, the outer space is limited by a jacket tube.

Um die Effizienz der Abscheidung zu erhöhen, kann der Einsatz eine Mehrzahl von in Strömungsrichtung voneinander beabstandeten Öffnungen aufweisen. Wenn die Suspension durch den Innenraum strömt, werden nach und nach ferromagnetische Partikel von der Suspension abgeschieden, sodass sich die Konzentration der ferromagnetischen Partikel in dem Außenraum fortlaufend erhöht.To increase the efficiency of the deposition, the insert may have a plurality of apertures spaced from one another in the flow direction. When the suspension flows through the interior, ferromagnetic particles are gradually separated from the suspension, so that the Concentration of the ferromagnetic particles in the outer space continuously increased.

Alternativ oder zusätzlich kann es vorgesehen sein, dass der Einsatz eine Mehrzahl von in Umfangsrichtung voneinander beabstandeten Öffnungen und eine Mehrzahl von Magneten aufweist. Jeder Öffnung in dem Einsatz kann dabei ein Magnet zugeordnet sein, sodass sich die ferromagnetischen Partikel radial von dem Innenraum in den Außenraum bewegen.Alternatively or additionally, it may be provided that the insert has a plurality of circumferentially spaced openings and a plurality of magnets. Each opening in the insert may be associated with a magnet, so that the ferromagnetic particles move radially from the interior to the outer space.

Gemäß einer Weiterbildung der Erfindung kann es vorgesehen sein, dass der wenigstens eine Magnet als Elektromagnet ausgebildet ist, der vorzugsweise ein- und ausschaltbar ist. Wenn ein Elektromagnet bzw. eine Mehrzahl von Elektromagneten vorgesehen ist, können diese gesteuert ein- und ausgeschaltet werden. Bei ausgeschaltetem Elektromagnet bricht das Magnetfeld zusammen, sodass die an der Innenwandung des Außenraums anhaftenden ferromagnetischen Partikel von der Strömung mitgerissen werden. In diesem Zustand kann die Suspension, die sich im Außenraum befindet, abgetrennt werden, wodurch die gewünschte Separation der ferromagnetischen Partikel von der Suspension erreicht wird. Anschließend können die Elektromagnete wieder eingeschaltet werden, sodass die ferromagnetischen Partikel wieder von dem Innenraum in den Außenraum strömen und dort an der Innenwandung des Reaktors anhaften. Eine Steuerung der Bewegung der ferromagnetischen Partikel kann bei der erfindungsgemäßen Vorrichtung auch dadurch erfolgen, dass die Stärke des durch den wenigstens einen Elektromagneten erzeugten Magnetfelds steuerbar ist.According to one embodiment of the invention, it may be provided that the at least one magnet is designed as an electromagnet, which is preferably switched on and off. If an electromagnet or a plurality of electromagnets is provided, these can be controlled on and off. When the electromagnet is switched off, the magnetic field collapses, so that the ferromagnetic particles adhering to the inner wall of the outer space are entrained by the flow. In this state, the suspension, which is located in the outer space, are separated, whereby the desired separation of the ferromagnetic particles is achieved by the suspension. Subsequently, the electromagnets can be turned on again, so that the ferromagnetic particles flow again from the interior into the outer space and adhere there to the inner wall of the reactor. A control of the movement of the ferromagnetic particles can also take place in the device according to the invention in that the strength of the magnetic field generated by the at least one electromagnet is controllable.

Im Rahmen der Erfindung kann es auch vorgesehen sein, dass die Durchmesser von Innenraum und Außenraum und die Strömungsgeschwindigkeit der Suspension so gewählt sind, dass nahezu keine Querströmung zwischen Innenraum und Außenraum auftritt. Dazu ist es erforderlich, dass zwischen Innenraum und Außenraum kein bzw. nur ein geringer Druckverlust auftritt, wodurch eine unerwünschte Querströmung vermieden wird, sodass lediglich die ferromagnetischen Partikel unter dem Einfluss des Magnetfelds vom Außenraum in den Innenraum strömen.In the context of the invention, it can also be provided that the diameters of the interior and exterior space and the flow velocity of the suspension are selected such that there is virtually no cross flow between the interior space and the exterior space. For this purpose, it is necessary that no or only a small pressure loss occurs between the interior and exterior, thereby avoiding unwanted cross flow is so that only the ferromagnetic particles flow under the influence of the magnetic field from the outer space into the interior.

Gemäß einer Weiterbildung der Erfindung kann es vorgesehen sein, dass eine Steuerung zum Ein- oder Ausschalten der Strömung in dem Außenraum und/oder dem Innenraum vorgesehen ist. Zum Separieren der in dem Außenraum angesammelten ferromagnetischen Partikel kann die Strömung in dem Außenraum eingeschaltet werden, während sie im Innenraum ausgeschaltet ist. Umgekehrt kann auch lediglich die Strömung im Innenraum eingeschaltet sein, sodass ferromagnetische Partikel unter dem Einfluss des Magnetfelds in den Außenraum wandern, in dem keine Strömung herrscht. Es ist auch möglich, dass die Strömung im Außenraum intervallweise oder intermittierend eingeschaltet wird.
Weitere Vorteile und Einzelheiten der Erfindung werden anhand eines Ausführungsbeispiels unter Bezugnahme auf die Figur erläutert.According to one embodiment of the invention, it can be provided that a control for switching on or off the flow in the outer space and / or the interior is provided. For separating the ferromagnetic particles accumulated in the outside space, the flow in the outside space can be turned on while being turned off in the inside space. Conversely, only the flow in the interior can be switched on, so that ferromagnetic particles migrate under the influence of the magnetic field into the outer space, in which there is no flow. It is also possible that the flow in the outer space is turned on intermittently or intermittently.
Further advantages and details of the invention will be explained with reference to an embodiment with reference to the figure.

Die Figur ist eine schematische Darstellung und zeigt einen Schnitt durch eine erfindungsgemäße Vorrichtung zum Abscheiden ferromagnetischer Partikel aus einer Suspension.The figure is a schematic representation and shows a section through a device according to the invention for separating ferromagnetic particles from a suspension.

Die Vorrichtung 1 umfasst einen Reaktor 2, an dessen Außenseite Magnete 3, 4 angeordnet sind. Es handelt sich dabei um Elektromagnete, die mittels einer Steuerung 5 ein- und ausgeschaltet werden können.The device 1 comprises a reactor 2, on the outside of which magnets 3, 4 are arranged. These are electromagnets that can be switched on and off by means of a controller 5.

Der Reaktor 2 umfasst einen Einsatz 6, der in dem dargestellten Ausführungsbeispiel rohrförmig ausgebildet ist. Der Reaktor 2 ist ebenfalls rohrförmig bzw. zylinderförmig ausgebildet. Der Einsatz 6 in dem Reaktor 2 trennt einen Innenraum 7 im Inneren des Einsatzes 6 von einem Außenraum 8, der einen ringförmigen Querschnitt aufweist und von der Außenwand des Reaktors 2 begrenzt wird.The reactor 2 comprises an insert 6, which is tubular in the illustrated embodiment. The reactor 2 is also tubular or cylindrical. The insert 6 in the reactor 2 separates an inner space 7 in the interior of the insert 6 from an outer space 8, which has an annular cross-section and is delimited by the outer wall of the reactor 2.

Der Einsatz 6 weist mehrere zueinander beabstandete Öffnungen 9, 10 auf, durch die der Innenraum 7 mit dem Außenraum 8 verbunden ist. Die Öffnung 9 befindet sich in der Nähe des Magneten 3, die Öffnung 10 befindet sich in der Nähe des Magneten 4. Bei anderen Ausführungen können weitere Öffnungen vorhanden sein, die entweder über den Umfang des Einsatzes 6 verteilt und/oder in Längsrichtung des Einsatzes 6, also in Strömungsrichtung, verteilt angeordnet sind. Jeder dieser weiteren Öffnungen kann ein Magnet zugeordnet sein.The insert 6 has a plurality of spaced-apart openings 9, 10, through which the inner space 7 is connected to the outer space 8. The opening 9 is located in the vicinity of the magnet 3, the opening 10 is located in the vicinity of the magnet 4. In other embodiments, further openings may be present, which are distributed either over the circumference of the insert 6 and / or in the longitudinal direction of the insert. 6 , So arranged in the flow direction, distributed. Each of these further openings may be associated with a magnet.

Die in der Figur gezeigte Vorrichtung ermöglicht das Abscheiden ferromagnetischer Partikel aus einer Suspension. Der Innenraum 7 des Reaktors 2 wird über eine nicht dargestellte Leitung mit der Suspension 11 befüllt und kontinuierlich von der Suspension 11 durchströmt. Wenn die Magnete 3, 4 durch die Steuerung 5 eingeschaltet werden, werden in der Suspension 11 enthaltene ferromagnetische Partikel unter dem Einfluss des durch die Magnete 3, 4 erzeugten Magnetfelds aus der Strömung radial abgelenkt. Die ferromagnetischen Partikel passieren die Öffnungen 9, 10 und gelangen in den Außenraum 8 des Reaktors 2, wo sie sich an der Innenwandung ansammeln, wie in der Figur gezeigt ist. Der Außenraum 8 kann ebenfalls von der Suspension 11 durchströmt werden, es ist jedoch auch denkbar, die Suspension 11 lediglich durch den Innenraum 7 strömen zu lassen, sodass sich in dem Außenraum 8 nach und nach die ferromagnetischen Partikel ansammeln. Die Strömungsgeschwindigkeit in dem Innenraum 7 wird dabei so auf die geometrischen Parameter des Reaktors und insbesondere auf die Größe und Anzahl der Öffnungen 9, 10 abgestimmt, dass praktisch kein Druckverlust zwischen dem Innenraum 7 und dem Außenraum 8 auftritt, sodass keine Querströmung über die Öffnungen 9, 10 entsteht und lediglich die ferromagnetischen Partikel unter dem Einfluss des Magnetfelds aus dem Innenraum 7 in den Außenraum 8 wandern.The device shown in the figure allows the separation of ferromagnetic particles from a suspension. The interior 7 of the reactor 2 is filled via a line, not shown, with the suspension 11 and continuously flows through the suspension 11. When the magnets 3, 4 are switched on by the controller 5, ferromagnetic particles contained in the suspension 11 are deflected radially out of the flow under the influence of the magnetic field generated by the magnets 3, 4. The ferromagnetic particles pass through the openings 9, 10 and enter the outer space 8 of the reactor 2, where they accumulate on the inner wall, as shown in the figure. The outer space 8 can also be flowed through by the suspension 11, but it is also conceivable to allow the suspension 11 to flow only through the inner space 7, so that the ferromagnetic particles gradually accumulate in the outer space 8. The flow velocity in the interior space 7 is adjusted to the geometrical parameters of the reactor and in particular to the size and number of the openings 9, 10 so that practically no pressure loss occurs between the interior space 7 and the exterior space 8, so that no cross flow through the openings 9 , 10 arises and only the ferromagnetic particles under the influence of the magnetic field from the interior 7 in the outer space 8 wander.

Beim Abschalten der Magnete 3, 4 mittels der Steuerung 5 oder manuell lösen sich die an der Innenwandung des Reaktors 2 anhaftenden magnetischen Partikel und können durch die Strömung mitgenommen und abgeschieden werden. Die Trennung der abgeschiedenen ferromagnetischen Partikel von der restlichen Suspension kann anschließend leicht durch ein Sieb oder dergleichen erfolgen.When switching off the magnets 3, 4 by means of the controller 5 or manually solve the on the inner wall of the reactor. 2 adhering magnetic particles and can be taken by the flow and deposited. The separation of the deposited ferromagnetic particles from the remaining suspension can then easily be done through a sieve or the like.

Die Steuerung 5 kann auch eingesetzt werden, um die Stärke des durch die Magnete 3, 4 erzeugten Magnetfelds zu steuern. Das magnetische Feld kann so gesteuert werden, dass es in Intervallen oder intermittierend ein- und ausgeschaltet wird, sodass die an der Innenwand des Reaktors 2 anhaftenden ferromagnetischen Partikel nach einer bestimmten Zeit automatisch abgeschieden werden. Die Steuerung ist auch in der Lage, die Strömung durch den Innenraum 7 (Primärströmung) bzw. die Strömung in dem Außenraum 8 (Sekundärströmung) ein- oder auszuschalten, sodass beispielsweise der Außenraum 8 gezielt gespült werden kann.The controller 5 can also be used to control the strength of the magnetic field generated by the magnets 3, 4. The magnetic field can be controlled to turn on and off intermittently or intermittently so that the ferromagnetic particles adhering to the inner wall of the reactor 2 are automatically deposited after a certain time. The controller is also able to turn the flow through the interior 7 (primary flow) or the flow in the exterior space 8 (secondary flow) on or off, so that, for example, the exterior space 8 can be flushed in a targeted manner.

Mit der in der Figur gezeigten Vorrichtung ist ein kontinuierlicher Betrieb und eine kontinuierliche Abscheidung der ferromagnetischen Partikel möglich, ohne dass die Primärströmung unterbrochen werden muss.With the apparatus shown in the figure, a continuous operation and a continuous deposition of the ferromagnetic particles is possible without the primary flow having to be interrupted.

Claims (8)

  1. Device (1) for separating ferromagnetic particles from a suspension, having a reactor (2) through which the suspension can flow, with at least one magnet (3, 4) arranged on the outside of the reactor (2) for the formation of a magnetic field which deflects the ferromagnetic particles, characterized in that the at least one magnet (3, 4) forms a magnetic field which radially deflects the ferromagnetic particles, the reactor (2) has an inner space (7) and an outer space (8) surrounding the inner space, the inner space (7) and the outer space (8) being separated from one another by a tubular insert (6), and the insert (6) having at least one radial opening (9, 10) in the vicinity of the at least one magnet (3, 4) for receiving the radially deflected ferromagnetic particles.
  2. Device according to Claim 1, characterized in that the inner space (7) has a circular cross section and the outer space (8) has an annular cross section.
  3. Device according to Claim 1 or 2, characterized in that the insert (6) has a multiplicity of openings (9, 10) which are separated from one another in the flow direction.
  4. Device according to one of the preceding claims, characterized in that the insert has a multiplicity of openings which are separated from one another in the circumferential direction and to which the at least one magnet is respectively assigned.
  5. Device according to one of the preceding claims, characterized in that the at least one magnet (3, 4) is formed as an electromagnet, which can preferably be switched on and off.
  6. Device according to Claim 5, characterized in that the strength of the magnetic field generated by the electromagnet (3, 4) is controllable.
  7. Device according to one of the preceding claims, characterized in that the diameters of the inner space (7) and outer space (8) and the flow rate of the suspension (11) are selected so that virtually no transverse flow takes place between the inner space (7) and the outer space (8).
  8. Device according to one of the preceding claims, characterized in that it comprises a controller (5) for switching the flow on or off in the outer space (8) and/or the inner space (7).
EP09783394.1A 2008-11-13 2009-09-25 Device for separating ferromagnetic particles from a suspension Active EP2346612B1 (en)

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RU2474478C1 (en) 2013-02-10
CN102215975A (en) 2011-10-12
RU2011123904A (en) 2012-12-20
AU2009315864B2 (en) 2012-12-06
WO2010054885A1 (en) 2010-05-20
US8632684B2 (en) 2014-01-21
PE20120202A1 (en) 2012-03-09
CN102215975B (en) 2014-09-17
DE102008057082A1 (en) 2010-05-27
CL2011000934A1 (en) 2011-08-05
ES2424876T3 (en) 2013-10-09
US20110220580A1 (en) 2011-09-15
CA2743364C (en) 2014-07-22
AU2009315864A1 (en) 2010-05-20
CA2743364A1 (en) 2010-05-20
PL2346612T3 (en) 2013-12-31
EP2346612A1 (en) 2011-07-27

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